diff --git a/.github/workflows/check-python-package-versions.yaml b/.github/workflows/check-python-package-versions.yaml
index 4b0fdf41..1fa230ce 100644
--- a/.github/workflows/check-python-package-versions.yaml
+++ b/.github/workflows/check-python-package-versions.yaml
@@ -1,7 +1,7 @@
 name: Check Python package version numbers
 
 on:
-  pull_request_target:
+  pull_request:
     paths:
       - '**/pyproject.toml'
       - 'packages/**/__about__.py'